Intermittent gravity sludge concentration tank

Abstract

The utility model is applicable to the technical field of sewage treatment, and provides an intermittent gravity sludge thickening tank which comprises a tank body, a working bridge is arranged at the top end of the tank body, a feeding sleeve is arranged in the middle of the bottom of the working bridge, and a cavity is formed in the feeding sleeve. A sludge injection mechanism is installed on the side, located on the feeding sleeve, of the pool body, a sludge discharging mechanism is installed at the bottom of the pool body, a sludge gathering groove is formed in the bottom of the pool body, and a PLC is installed on the working bridge. The sludge discharging mechanism and the sludge injection mechanism work intermittently, in each batch of treatment, the sludge is fully settled in a static state, hydraulic disturbance is reduced, the solid-liquid separation effect is improved, the solid content of concentrated sludge is higher, the operation cost and energy consumption are low, the natural flocculation characteristic of the sludge can be fully utilized through standing settling, and the dosage of a flocculating agent is reduced; the device is used for batch treatment, flexible regulation and control and efficient standing sedimentation, and is used for dealing with complex water quality, reducing the operation cost and improving the sludge concentration efficiency.

Description

Technical Field

[0001] This utility model relates to wastewater treatment, and in particular to an intermittent gravity sludge thickening tank. Background Technology

[0002] The sludge produced during wastewater treatment has a high water content, resulting in a large volume and posing challenges to its treatment, utilization, and transportation. Sludge thickening reduces the water content and volume of the sludge by thickening it, thereby lowering subsequent treatment costs. Common methods for sludge thickening include gravity thickening, flotation thickening, and centrifugal thickening.

[0003] Existing sludge thickening tanks typically use continuous sludge feeding and discharging. Continuous sludge feeding leads to incomplete sludge settling, and the sludge is discharged along with the supernatant, resulting in poor thickening effect. At the same time, the operating cost and energy consumption are high, and the consumption of chemicals is large. Utility Model Content

[0004] This utility model provides an intermittent gravity sludge thickening tank, which aims to solve the problems of existing sludge thickening tanks that usually adopt continuous sludge feeding and discharging. Continuous sludge feeding leads to incomplete sludge settling, and sludge is discharged with the supernatant, resulting in poor thickening effect, as well as high operating costs and energy consumption.

[0005] This utility model is implemented as follows: an intermittent gravity sludge thickening tank includes a tank body, a working bridge at the top of the tank body, a feed sleeve at the bottom center of the working bridge, the feed sleeve having an internal cavity, a sludge injection mechanism installed on one side of the tank body located on the feed sleeve, a sludge discharge mechanism installed at the bottom of the tank body, a sludge accumulation trough opened at the bottom of the tank body, and a PLC controller installed on the working bridge.

[0006] Preferably, the sludge injection mechanism includes: a sludge injection pump, which is installed on one side of the tank body. The input end of the sludge injection pump is fixedly connected to a sludge inlet pipe, and the output end of the sludge injection pump is fixedly connected to a sludge injection pipe. The end of the sludge injection pipe away from the sludge injection pump passes through the side wall of the tank body and the feed sleeve in sequence, and extends to the bottom of the internal cavity of the feed sleeve.

[0007] The beneficial effect of adopting the above-mentioned further solution is that it can be used to control the injection of external sludge into the tank.

[0008] Preferably, the sludge discharge mechanism includes: a sludge discharge pump, which is installed on one side of the bottom of the tank. The input end of the sludge discharge pump is fixedly connected to a sludge suction pipe. The end of the sludge suction pipe away from the sludge discharge pump passes through the side wall of the sludge collection tank and communicates with the bottom of the sludge collection tank. The output end of the sludge discharge pump is fixedly connected to a sludge discharge pipe.

[0009] The beneficial effect of adopting the above-mentioned further solution is that it is used to discharge the sludge that settles at the bottom of the pool.

[0010] Preferably, an overflow trough is provided around the upper part of the inside of the pool body, and several sets of overflow pipes are provided on the outer wall of the pool body at the bottom of the overflow trough, and the several sets of overflow pipes are connected to the overflow trough in sequence.

[0011] The beneficial effects of adopting the above-mentioned further solution are: it can be used to discharge this part of the supernatant in a timely manner, ensuring the concentration efficiency. At the same time, it can prevent the water level in the pool from being too high, which could lead to sludge overflow or equipment overload, while maintaining a stable settling environment in the pool.

[0012] Preferably, the bottom of the pool is conical, and the mud-gathering trough is located in the middle of the bottom of the cone.

[0013] The beneficial effects of adopting the above-mentioned further scheme are: the sludge that is easy to settle gathers towards the center through the conical inclined trough, and the sludge that is easy to settle and gather is collected through the sludge collection trough 6, which facilitates the subsequent centralized discharge of sludge.

[0014] Preferably, the sidewall of the pool is provided with several sets of drain pipes, which are arranged vertically at intervals in sequence.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the drainage location can be selected according to the interface height after sludge settling, and the amount of liquid discharged can be precisely controlled.

[0016] Preferably, the working bridge is provided with an observation hole above the feed sleeve.

[0017] The beneficial effects of adopting the above-mentioned further solution are: it can be used to observe the internal condition of the feed sleeve, whether there is sludge blockage, etc., which facilitates timely maintenance and handling by staff.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an intermittent gravity sludge thickening tank, which is equipped with a sludge injection mechanism to control the injection of external sludge into the tank body, and a sludge discharge mechanism to discharge the sludge settled at the bottom of the tank body. The sludge discharge mechanism and the sludge injection mechanism are controlled to work intermittently by a PLC controller. In each batch of processing, the sludge settles fully in a static state, reducing hydraulic disturbance, improving the solid-liquid separation effect, and resulting in a higher solids content in the thickened sludge, ensuring that the discharged supernatant is clear. The operating cost and energy consumption are low. Static settling can make full use of the natural flocculation characteristics of sludge, reducing the amount of flocculant used. This device can handle batch processing, be flexibly controlled, and achieve efficient static settling, which is beneficial for dealing with complex water quality, reducing operating costs, and improving sludge thickening efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the side view structure;

[0021] Figure 3 for Figure 1 Another side view of the structure.

[0022] In the diagram: 1. Tank body; 2. Working bridge; 3. Feed sleeve; 4. Sludge injection mechanism; 41. Sludge injection pump; 42. Sludge inlet pipe; 43. Sludge injection pipe; 5. Sludge discharge mechanism; 51. Sludge discharge pump; 52. Sludge suction pipe; 53. Sludge discharge pipe; 6. Sludge accumulation tank; 7. Overflow tank; 8. Overflow pipe; 9. Drainage pipe; 10. PLC controller. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Please see Figure 1-3 This utility model provides a technical solution for an intermittent gravity sludge thickening tank: an intermittent gravity sludge thickening tank includes a tank body 1, a working bridge 2 is provided at the top of the tank body 1, a feed sleeve 3 is provided at the middle of the bottom of the working bridge 2, the inside of the feed sleeve 3 is a cavity, a sludge injection mechanism 4 is installed on one side of the tank body 1 located on the feed sleeve 3, a sludge discharge mechanism 5 is installed at the bottom of the tank body 1, a sludge accumulation trough 6 is opened at the bottom of the tank body 1, and a PLC controller 10 is installed on the working bridge 2.

[0025] In this embodiment, a sludge injection mechanism 4 is provided to control the injection of external sludge into the tank 1, and a sludge discharge mechanism 5 is provided to discharge the sludge settled at the bottom of the tank 1. The sludge discharge mechanism 5 and the sludge injection mechanism 4 are controlled to work intermittently by a PLC controller 10. Sludge is injected through the sludge injection mechanism 4, and after the sludge settles, the supernatant is discharged. Then, the concentrated sludge is discharged by driving the sludge discharge pump 51. In each batch of processing, the sludge settles fully in a static state, reducing hydraulic disturbance and improving the solid-liquid separation effect. The concentrated sludge has a higher solids content, ensuring that the discharged supernatant is clear. The operating cost and energy consumption are low. Static settling can make full use of the natural flocculation characteristics of sludge, reducing the amount of flocculant used. This device can handle batch processing, flexibly control and efficiently settle, and cope with complex water quality, reduce operating costs and improve sludge concentration efficiency.

[0026] Furthermore, the sludge injection mechanism 4 includes: a sludge injection pump 41, which is installed on one side of the tank body 1. The input end of the sludge injection pump 41 is fixedly connected to a sludge inlet pipe 42, and the output end of the sludge injection pump 41 is fixedly connected to a sludge injection pipe 43. The end of the sludge injection pipe 43 facing away from the sludge injection pump 41 passes through the side wall of the tank body 1 and the feed sleeve 3 in sequence, and extends to the bottom of the internal cavity of the feed sleeve 3.

[0027] In this embodiment, a sludge injection mechanism 4 is provided to control the injection of external sludge into the tank 1. The sludge injection mechanism 4 includes a sludge injection pump 41, a sludge inlet pipe 42, and a sludge injection pipe 43. The sludge inlet pipe 42 is connected to an external feed pipe, and the sludge injection pump 41 is driven to transport the external sludge to be concentrated into the sludge injection pipe 43 through the sludge inlet pipe 42. The sludge is then injected into the feed sleeve 3 through the sludge injection pipe 43. The sludge injection pump 41 is electrically connected to a PLC controller 10, and the PLC controller 10 controls the sludge injection pump 41 to intermittently inject sludge into the tank 1.

[0028] Typically, the sludge discharge mechanism 5 includes: a sludge discharge pump 51, which is installed on one side of the bottom of the tank 1. The input end of the sludge discharge pump 51 is fixedly connected to a sludge suction pipe 52. One end of the sludge suction pipe 52, which is away from the sludge discharge pump 51, passes through the side wall of the sludge collection tank 6 and communicates with the bottom of the sludge collection tank 6. The output end of the sludge discharge pump 51 is fixedly connected to a sludge discharge pipe 53.

[0029] In this embodiment, a sludge discharge mechanism 5 is provided to discharge the sludge that settles at the bottom of the tank 1. The sludge discharge mechanism 5 includes a sludge discharge pump 51, a sludge suction pipe 52, and a sludge discharge pipe 53. The sludge discharge pipe 53 is connected to the external sludge discharge system through a pipe. The sludge discharge pump 51 drives the sludge suction pipe 52 to discharge the sludge that has settled in the sludge collection tank 6 into the sludge discharge pipe 53 and then discharges it through the sludge discharge pipe 53. The sludge discharge pump 51 is electrically connected to the PLC controller 10 and works intermittently with the sludge injection mechanism 4. Sludge is injected through the sludge injection mechanism 4, and after the sludge settles, the supernatant is discharged. Then, the concentrated sludge is discharged by driving the sludge discharge pump 51.

[0030] Specifically, an overflow trough 7 is provided around the upper part of the inside of the pool body 1, and several sets of overflow pipes 8 are provided on the outer wall of the pool body 1 at the bottom of the overflow trough 7. The several sets of overflow pipes 8 are connected to the overflow trough 7 in sequence.

[0031] In this embodiment, by providing an overflow trough 7, during the gravity settling process of sludge, solid particles settle to form a concentrated sludge layer, while the upper layer is a clear liquid. The overflow port is located at the top of the tank to discharge this part of the supernatant in a timely manner, ensuring the concentration efficiency. At the same time, it can prevent the water level in the tank from being too high, which could lead to sludge overflow or equipment overload, while maintaining a stable settling environment in the tank. The overflow pipe 8 discharges the overflowed supernatant.

[0032] In addition, the bottom of the pool 1 is conical, and the mud collection trough 6 is located in the middle of the bottom of the cone.

[0033] In this embodiment, the bottom of the pool 1 is conical, which facilitates the settling of sludge by allowing it to gather towards the center through a conical trough. A sludge collection trough 6 is provided at the bottom of the cone, which facilitates the collection of the settled sludge and allows for its subsequent centralized discharge. A sludge scraping device is installed on the conical trough of the pool 1 to prevent sludge from caking. This structure is common in the field and will not be described in detail here.

[0034] In addition, the side wall of the pool body 1 is provided with several sets of drainage pipes 9, which are arranged vertically at intervals.

[0035] In this embodiment, drain pipes 9 are installed at different water levels on the side wall of the pool 1, and each drain pipe 9 is equipped with an external valve. The drainage position is selected according to the interface height after sludge settling, and the amount of liquid discharged is precisely controlled.

[0036] It should be noted that the working bridge 2 is provided with an observation hole above the feed sleeve 3.

[0037] In this embodiment, an observation hole is provided above the feed sleeve 4 to observe the internal condition of the feed sleeve 3 and whether there is sludge blockage, so that the staff can maintain and handle it in a timely manner.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intermittent gravity sludge thickening tank, characterized in that: The system includes a pool body (1), a working bridge (2) at the top of the pool body (1), a feeding sleeve (3) at the bottom center of the working bridge (2), the feeding sleeve (3) having a cavity inside, a sludge injection mechanism (4) installed on one side of the pool body (1) near the feeding sleeve (3), a sludge discharge mechanism (5) installed at the bottom of the pool body (1), a sludge collection trough (6) opened at the bottom of the pool body (1), and a PLC controller (10) installed on the working bridge (2).

2. The intermittent gravity sludge thickening tank according to claim 1, characterized in that: The sludge injection mechanism (4) includes: a sludge injection pump (41), which is installed on one side of the tank (1). The input end of the sludge injection pump (41) is fixedly connected to a sludge inlet pipe (42), and the output end of the sludge injection pump (41) is fixedly connected to a sludge injection pipe (43). The end of the sludge injection pipe (43) away from the sludge injection pump (41) passes through the side wall of the tank (1) and the feed sleeve (3) in sequence, and extends to the bottom of the internal cavity of the feed sleeve (3).

3. The intermittent gravity sludge thickening tank according to claim 1, characterized in that: The sludge discharge mechanism (5) includes: a sludge discharge pump (51), which is installed on the bottom side of the pool body (1). The input end of the sludge discharge pump (51) is fixedly connected to a sludge suction pipe (52). The end of the sludge suction pipe (52) away from the sludge discharge pump (51) passes through the side wall of the sludge collection tank (6) and communicates with the bottom of the sludge collection tank (6). The output end of the sludge discharge pump (51) is fixedly connected to a sludge discharge pipe (53).

4. The intermittent gravity sludge thickening tank according to claim 1, characterized in that: An overflow trough (7) is provided around the upper part of the pool body (1). Several sets of overflow pipes (8) are provided on the outer wall of the pool body (1) at the bottom of the overflow trough (7). The several sets of overflow pipes (8) are connected to the overflow trough (7) in sequence.

5. An intermittent gravity sludge thickening tank according to claim 1, characterized in that: The bottom of the pool (1) is conical, and the mud-gathering trough (6) is located in the middle of the bottom of the cone.

6. An intermittent gravity sludge thickening tank according to claim 1, characterized in that: The side wall of the pool (1) is provided with several sets of drain pipes (9), which are arranged vertically at intervals.

7. An intermittent gravity sludge thickening tank according to claim 1, characterized in that: The working bridge (2) is located above the feed sleeve (3) and has an observation hole.

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